36 
CHARLES BADHAM. 
I have not determined, by the staining methods of Brumpt,. 
if there are two kinds of gland cells present ; but in sections 
stained by haematoxylin and eosin they appear to be all of 
one kind. 
The bursa, which is shown in PJ. 2, fig. 6 (a medial 
sagittal section) is lined by a continuation of the epidermis of 
the body. 
The ovaries, which are two simple sacs lying free in the 
ventral lacuna, show considerable movement in the living' 
animal — a fact which Moquin-Tandon (1846) says caused 
Rondeau to take them for hearts in certain leeches. They 
become united just above the 13tli nerve ganglion, and from 
their junction the oviduct (PI. 2, figs. 6, 12a, Ovd.) runs 
dorsally and curves to enter the glandular part of the bursa 
(PI. 2, figs. 6, 12a, B. gl.). After their junction, the ovaries 
are continued forward to form each an anterior horn. The 
oviduct, which has a small lumen (PL 2, figs. 6, 12a, Ovd.), 
has a wall of circular muscle fibres, and external to these- 
a well-developed connective tissue layer with large nuclei, 
such as Brumpt has described as general in Ichthyobdellids,. 
and through which, he says, spermatozoa are frequently seen 
working their way. 
The epithelium lining the vagina is a continuation of the 
epidermis of the body, which is thrown into folds in the 
glandular part of the bursa. 
The ovaries in adult specimens are filled with ova in 
various stages of development. The development of the 
ovum (PI. 2, fig. 6, Ov.) and the breaking-down of the yolk 
cells appear to be similar to what occurs in Callobdella 
lophii, as described by Brumpt. Near the oviduct the ova 
are seen undergoing the first maturation division. 
This work was begun while holding the John Coutts* 
Scholarship. I wish to thank Prof. W. A. Haswell, in whose 
laboratories I worked, for his advice and kindness. Mr. 
F. W. Atkins, of the Sydney Technical College, re-drew the 
figures, and Mr. W. Graham, of the Department of Zoology 
